The average bus between Portsmouth and Southam takes 9h 33m and the fastest bus takes 5h 6m. The bus service runs several times per day from Portsmouth to Southam. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run 4 times a day between Portsmouth and Southam. The earliest departure is at 5:35 AM in the morning, and the last departure from Portsmouth is at 8:10 PM which arrives into Southam at 8:20 AM. All services require a transfer at Heathrow Central Bus Station and take an average of 9h 33m. The schedules shown below are for the next available departures.



8h 38m • 3 changes
Arrives next day



15h 12m • 3 changes
Arrives next day



12h 10m • 3 changes



6h 30m • 3 changes



8h 25m • 3 changes



7h 8m • 3 changes



6h 48m • 3 changes



6h • 3 changes



8h 15m • 3 changes



7h 5m • 3 changes



6h 15m • 3 changes



5h 6m • 3 changes



8h 41m • 3 changes



8h 21m • 3 changes
Arrives next day



17h 32m • 3 changes



6h 30m • 3 changes



8h 25m • 3 changes



7h 8m • 3 changes
Arrives next day



14h 37m • 3 changes
Want to know about travelling from Portsmouth to Southam? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Portsmouth to Southam. However, there are services departing from Portsmouth station and arriving at Southam station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 9h 33m.
Portsmouth to Southam bus services, operated by National Express, depart from The Hard Interchange station.
Portsmouth to Southam bus services, operated by National Express, arrive at Pool Meadow Bus Station.
The distance between Portsmouth and Southam is 163 km. The road distance is 296 km.
You can take a bus from The Hard Interchange to Park Lane via Heathrow Central Bus Station, Pool Meadow Bus Station, Transport Museum, and Upper Parade in around 6h 16m.